Date: Thu, 08 Mar 2007 07:12:08 -0700 (MST) From: "M. Warner Losh" <imp@bsdimp.com> To: krassi@bulinfo.net Cc: freebsd-arm@freebsd.org Subject: Re: driver proposal Message-ID: <20070308.071208.-135505547.imp@bsdimp.com> In-Reply-To: <45F01893.3060605@bulinfo.net> References: <45F01893.3060605@bulinfo.net>
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In message: <45F01893.3060605@bulinfo.net>
Krassimir Slavchev <krassi@bulinfo.net> writes:
: Hi,
:
: From the datasheet:
: The PCF8563 is a CMOS real time clock/calendar optimized for low power
: consumption. A programmable clock output, interrupt output and
: voltage-low detector
: are also provided. All address and data are transferred serially via a
: two-line
: bidirectional I2C-bus. Maximum bus speed is 400 kbit/s. The built-in
: word address
: register is incremented automatically after each written or read data byte.
:
: There is the driver:
: http://mnemonic.bulinfo.net/~krassi/pcf8563.c
I'll take a look! thanks for the contribution...
: The chip uses only 0xa2 as a slave address but on my arm board the TWI
: controller rewrites it to 0x51, so device hints can be used:
Actually, I have code in p4 that fixes this issue. All the other iic
drivers use 7-1 address notation, while TWI uses 6-0.
: hint.pcf8563.0.at="iicbus0"
: hint.pcf8563.0.addr=0x51
:
: I will be very happy if anyone commit this driver.
I'll do so...
Warner
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